<nav class="navbar navbar-default">
  <div class="container-fluid">
    <div class="navbar-header">
      <a class="navbar-brand" href="/admin">后台管理</a>
    </div>

    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
      <ul class="nav navbar-nav">
        <li><a href="/admin/user">用户管理</a></li>
        <li class="dropdown">
            <a
              href="#"
              class="dropdown-toggle"
              data-toggle="dropdown"
              role="button"
              aria-haspopup="true"
              aria-expanded="false"
            >
              分类管理 <span class="caret"></span>
            </a>
            <ul class="dropdown-menu">
              <li><a href="/admin/category">分类首页</a></li>
              <li><a href="/admin/category/add">添加分类</a></li>
            </ul>
          </li>
        <li class="dropdown">
          <a 
            href="#" 
            class="dropdown-toggle"
            data-toggle="dropdown"
            role="button"
            aria-haspopup="true"
            aria-expanded="false"
          >
            内容管理 <span class="caret"></span>
          </a>
          <ul class="dropdown-menu">
            <li><a href="/admin/content">内容首页</a></li>
            <li><a href="/admin/content/add">添加内容</a></li>
          </ul>
        </li>
      </ul>
      <ul class="nav navbar-nav navbar-right">
        <li class="dropdown">
          <a
            href="#"
            class="dropdown-toggle"
            data-toggle="dropdown"
            role="button"
            aria-haspopup="true"
            aria-expanded="false"
          >
            admin <span class="caret"></span>
          </a>
          <ul class="dropdown-menu">
            <li><a href="/">退出</a></li>
          </ul>
        </li>
      </ul>
    </div>
  </div>
</nav>